Brick-clay-crusher rolls.



No. 813,273. I PATENTED FEB. 20, 1906.. J. H. BAGH: BRICK CLAY ORUSHER ROLLS.

APPLICATION FILED FEB. 6, 1903.

UNITED STTES P TNT JULIUS H. BACH, OF CHICAGO, TLLINCIS.

BRlCK-CLAY-CHUSHER ROLLS Specification of Letters Patent.

Patented Feb. 20, 1906.

Application filed February e, 1903. Serial No. 142,181.

' The mam object of my invention is to provide an improved construction for claycrusher rolls whereby stones will be readily removed from the clay and wherebythe excessive wear of the rolls due to the presence of such stones will be avoided, and particularly whereby the wearing of undesirable ruts or grooves in the rolls will be .in a large measure prevented or retarded. I accomplish this object by companying drawings, in which' Figure 1 is a top plan of a pair of crusherrolls constructed according to my invention. Fig. 2 is a side elevation of the same, showing parts of the feed hopper and a granulator above the rolls. Fig. 3 is an end elevation of the same.

The main features wherein the device shown differs from the device described in my Patent No. 728,831, of May 26, 1903, are, first, that one of the rolls herein shown is provided with spiral ridges instead of a spiral groove, and, second, that the space between adjacent convolutions or spires of said spiral ridges is considerably reater than the height of suchridges. Thee ectofthisconstruction is a much more rapid discharge of stones, since such stones receive a blow from the edge of the ridge and are often thrown along the rolls sufficientl with and be carrie along by one of the succeeding convolutions of the rid e. This action is facilitated by the incline sides of the ridges, which tend to project the stones upward sufliciently to clear the crest of the succeeding ridge.

The wide space between the adjacent convolutions also prevents the friction of a stone on two of such adjacent convolutions at the same time. The convolution having the forwarding efiect upon the stone is the only one in contact therewith, and such contact may be only momentary, since a stone dropping against such forwarding edge is frequently impelled toward or over the adjacent convolution ahead of the mere spiral driving power of the ridge.

the construction shown in the ac-- far to come in contact.

In the device shown in the drawings a pair of rolls- 1 and 2 are mounted on shafts 3 and 4, respectively, journaled in the bearings 5 and 6 on the frame 7-. The shafts 3 and 4 are connected together by the bevel-gears 8 and 9, and power is applied by a belt (not shown) to the pulley 10. The gear-wheel 8 is considerab y smaller than the gear-wheel 9, so

that the roller 1 will rotate with a greater peripheral speed than that of they roller 2. The peripheries of the rolls 1 and 2 are near together, but not in contact with each other. The roller 2 is provided with a lurality of spiral ridges its periphery in suitable direction to cause stones to be conveyed along the rolls toward the large end of same when the rolls are rotated in the direction indicated by arrows in the drawings. The ridges 11 are preferably made of less width than the space 12 between adjacent convolutions of same. The spaces 12 are preferably of a width e ual to six or ei ht times the height of the ri ges 11. The a vancing edges 17 of .the ridges are preferabl beveled, as shown.

he feed-hopper is indicated at 13, and a portion of the granulator is shown at 14. The wall 15 of the feed-hopper at the largest end of the rolls is provided with a flap 16, of flexible material, which extends down close to.

the peripheries of the rolls and serves to check the violence of the speed of stones discharged by the ridges 1 1.

The operation of the device shown is as follows: T e clay and stones contained therein after having been reduced by the granulator 14 are dropped into the feed-hop er '13 and delivered between the rolls. The c ay is crushed by the rolls and passes between same,while the stones are retalned in the trough of the rolls and throu h the action of the ridges 11 and the conicafform of the rolls are caused to roll along said trough toward the large end of therolls and finally pass out under the flap 16. The rotation of the rolls causes stones which are located between same to be struck by the advancing edges 17 of the ridges 11, causin said stones to be projected away from sai edges and along the trough between the rolls. The stones therefore receive a succession of intermittent blows from the edges 17 and are rapidly moved alon edges 17 are bevele the stones are projected somewhat upwardly and often sufiicientlt; far in the direction of the length of the r01 11, extending aroun and along said trough. Since the .one of t sulplporting-frame a pair of coacting crusherr0 to be engaged by the advancing edge 17 of e succeeding convolutions of the rldges 11.

The advantages of having the spaces between thc ridges of a width considerably eater than the height of the rid es are,

rst, that the obstructing forward wa l of the groove 1s, so to speak, taken out of the way and space is obtained for the full effect of the edge 17 in the free projection of the stones, and, secondly, that in consequence of this the stones not being confined in a groove are not held in continuous Wearin contact with the roll-surfaces and carried a ong at no greater speed than that determined by the pitch of t e groove, which, as shown in practice, results in the cutting of a spiral groove in the smoothroll and in the shortening by wear of the useful life of both rolls. By'my invention this life is greatly prolonged.

It will be seen that some of the details of the structure shown may be altered without departing from the spirit of my invention. I therefore do not confine myself to such details, except as hereinafter limited in the claims.

What I claim as my invention, and desire to secure by Letters Patent, is

1. An apparatus for crushing clay and removing the stones therefrom, comprising a s, one of same having a ridge extending spirally around and along its periphery, the width of the space between adjacent spires of said ridge being considerably greater than the height ofthe ridge, whereby said ridge is adapted to eject stones by discontinuous impluses, and the other roll having opposed to and coacting with the spirally-- j ridged part of the first roll, a periphery unbroken'by ridges or depressions; and means for simultaneously revolving said rolls; one of said rolls being geared to revolve at differl 3 mg r1 the first roll, a periphery unbroken by ridges or depressions; and means for simultaneously revolving said rolls; one of said rolls being conical and geared to revolve at different peripheral speeds than the other, substantially as described.

3. An apparatus for crushing clay. and removing the stones therefrom, comprising a supportin -frame; a pair of conical coacting crusher-r0 ls, one of same havin a ridge eX- L tending p v, jacent spires of said ridge being considerably greater than the height of the ridge, whereby said ridge is ada ted to eject stones b dis- Q continuous impul opposed to and coactinfi with the spirallys irally around and a ong its petiie-width of the space between adses, and the other rol haved part of the first ro a periphery unbro en by ridges or depressions; and means for simultaneously revo ving said rolls, one of i said rolls being geared to revolve at different peripheral speeds than the other, substantially as described.

Signed at Chicago this 2d day of February, 1903.

JULIUS n. EACH.

Witnesses WM. R. RUMMLER, R1 now RUMMLER. 

